C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

? Dust filter in Climate Control

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Old Apr 3, 2002 | 10:17 AM
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From: Oro Valley, AZ
2001 C240 6spd
? Dust filter in Climate Control

I have just over 16000 miles on my C240. Have not changed the dust filter in the climate control system. Has anyone changed the dust filter prior to this? later? dont know what I am talking about? Is there a recommended interval of changing the dust filter? Thanks.
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Old Apr 3, 2002 | 11:06 AM
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It's a long story (see my post in the Who cleans thier engine thread in the Detailing forum), but I had to change mine after 2 months and 2500 miles. It's $15 at my dealer (your's may be different than the coupe) and I changed it myself in 60 seconds. At that price, I'll change it every year or sooner if it gets very dirty.
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Old Apr 3, 2002 | 09:13 PM
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It is my understanding that Service A no longer changes the filter, so you have to specifically request this and pay extra.
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Old Apr 4, 2002 | 12:27 AM
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C240
Originally posted by avlis
It's a long story (see my post in the Who cleans thier engine thread in the Detailing forum), but I had to change mine after 2 months and 2500 miles. It's $15 at my dealer (your's may be different than the coupe) and I changed it myself in 60 seconds. At that price, I'll change it every year or sooner if it gets very dirty.
Where is the filter? how can i change it myself?
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Old Apr 4, 2002 | 07:43 AM
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It's clipped onto the passenger side firewall just behind the strut tower. There are 3 lever-type-clips that hold the housing on. Pop the clips, pull the housing off (wow-there's the battery!) and snap the filter out of the housing.
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Old Apr 4, 2002 | 09:19 AM
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From: Oro Valley, AZ
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Thanks. I have to check to see where the housing is in the sedan. If it is that easy, which is not a MB characteristic when it comes to finding/fixing things yourself nowadays, then I will do it myself. My next service is "B" in about 6000 miles. I think I will not wait and do it now. If it is a thing you have to request, then I will do it more frequently since it is not that expensive to do.
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Old Apr 4, 2002 | 12:02 PM
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Shtatc, If you find the way to change the filter, please post the steps so that we (sedan owner) can change it by our own more frequently. Thanks !!!
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Old Apr 4, 2002 | 12:53 PM
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When I bought my filter the parts guy was surprised it only cost $15 (I guess I was too). He mentioned the other C filter was $50 or $60. I don't know if he was refering to the sedan or previous generation.
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Old Apr 5, 2002 | 09:19 AM
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From: Oro Valley, AZ
2001 C240 6spd
How to change the dust filter.

It was very easy. The filter cost $19(with tax) at the dealer.
Part number for sedan(it may be safe to assume that the coupe is the same) is #A2038300118.

The dust filter housing is located on the firewall on the left side of the engine bay (passenger side). It covers the battery. I think the location is the same with the coupe.
Black plastic housing about 12"x8" held on by 3 clips. Unhook the clips and the housing pops off. The filter is inside this housing, just remove old filter and replace with new one. The filter is odd shaped...sort of a rectangle with one side at an obtuse angle. So the filter only fits one way. Replce housing/reattach clips and done. Took about 2 minutes.

The filter was dirty after 16K miles. I will probably change it every 10K or sooner depending on how it looks.
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Old Apr 5, 2002 | 10:09 AM
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shtatc,
Sounds like the sedan procedure is the same as the coupe. I believe the part number is the same as well. Thanks for posting the info.

I don't remember now if I paid $15 or $19 for mine...whatever...
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Old Apr 5, 2002 | 10:46 AM
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When I inquired with Clairparts about the cost of the charcoal filter for the sedan he replied with "which one, there are two". There is a canister charcoal filter under the dash somewhere that cost about $90 from Clairparts. That's the filter that comes into action when you push the filtered air button. The other filter everyone seems to be referring to that's over the battery is a coarse air inlet filter for taking out the big chunks. I don't know how you could tell the filter behind the firewall was dirty, it is a paper element with a fine black (charcoal?) coating on it that looked dirty the day I bought the car.
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Old Apr 5, 2002 | 11:03 AM
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mleskovar, where is the charcoal filter located? Is it easy to replace like the procedure that Shtatc mentioned on the other filter? I have the C320 and it comes with the charcoal filter button like you said. Any info are welcome. Thanks !!
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Old Apr 5, 2002 | 11:48 AM
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I don't know how you could tell the filter behind the firewall was dirty, it is a paper element with a fine black (charcoal?) coating on it that looked dirty the day I bought the car.
Now THAT'S interesting! The paper filter in my coupe (no charcoal filter button) is bright white when new. Now, I wonder if us coupe-sters can get the C320 charcoal filter element that goes on the firewall and get better filtration?
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Old Apr 5, 2002 | 02:03 PM
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From: Oro Valley, AZ
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I did not know about the charcoal filter inside the car. I should check into that one also. When I asked the service guy about the dust filter, he went right to the paper filter. I wonder if the charcoal filter is something not offered in all climate control cars. I do not have the auto electronic climate control. I have the manual one. Would this make a difference?
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Old Apr 5, 2002 | 04:10 PM
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According to the manual it's only on the C320.
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Old Apr 5, 2002 | 06:02 PM
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Originally posted by shtatc
I wonder if the charcoal filter is something not offered in all climate control cars. I do not have the auto electronic climate control. I have the manual one. Would this make a difference?
Yes that makes the whole difference. The charcoal filter only comes with the digital display climate control.
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Old Apr 5, 2002 | 07:43 PM
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newMBz....All I know is the canister filter is under the dash and since you can't see it in the open you'll need to remove a panel, or two? The book says "Replace activated charcoal filter" at 60K mi. or 5 years.
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Old Apr 5, 2002 | 10:32 PM
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The charcoal filter is only offered in higher end cars (C320 is where it starts) and it is an active system. It only turns on when it detects the need for it, hence stretching out its life.
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Old Apr 5, 2002 | 10:40 PM
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The C320/C32 charcoal filter is replaced by removing the panel under the dash on the right side. The housing for the filter is loacted next to the blower motor. You don't have to replace this filter very often, because it's simply not used very often. I wouldn't waste my time with it. However, the filter above the battery is constantly used, that should be replaced at every B-service.
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Old Apr 8, 2002 | 11:20 AM
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mleskovar and mbtech208..... Thanks for the info. It did help me to understand more about this two filters and how often need to change them. Good info !!!
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